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Note 12 - Stock-based Compensation (Tables) | 9 Months Ended
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Sep. 30, 2024
Notes Tables |
Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
|  | September 30, |  | December 31,
|  | 2024 |  | 2023
Dividend yield |  |  | 2.57% |  |  | 3.25%
Expected volatility |  |  | 29.55% |  |  | 28.24%
Risk-free interest rate |  |  | 3.82% |  |  | 4.35%
Expected term in years |  |  | 6.3 |  |  | 6.5
Weighted-average grant date fair value per option granted |  | $ | 11.36 |  | $ | 7.61
Share-Based Payment Arrangement, Option, Activity [Table Text Block] |
|  |  |  |  |  |  |  |  |  | Weighted-Average |  |  |  |  |
|  |  |  |  |  | Weighted- |  |  | Remaining |  |  |  |  |
|  |  |  |  |  | Average |  |  | Contractual Term In |  |  | Aggregate |
|  | Shares |  |  | Exercise Price |  |  | Years |  |  | Intrinsic Value |
Outstanding at January 1, 2024 |  |  | 662,279 |  |  | $ | 28.12 |  |  |  | 6.69 |  |  | $ | 5,852,975 |
Granted |  |  | 75,100 |  |  | $ | 41.98 |  |  |  | 9.87 |  |  |  | — |
Less exercised |  |  | 141,878 |  |  | $ | 21.88 |  |  |  | — |  |  | $ | 3,042,273 |
Less forfeited |  |  | 12,000 |  |  |  | 30.73 |  |  |  | — |  |  |  | — |
Outstanding at September 30, 2024 |  |  | 583,501 |  |  | $ | 31.37 |  |  |  | 6.75 |  |  | $ | 7,655,780 |
Expected to vest, assuming a 0.31% annual forfeiture rate at September 30, 2024 (1) |  |  | 568,654 |  |  | $ | 31.28 |  |  |  | 6.70 |  |  | $ | 7,513,895 |
Exercisable at September 30, 2024 |  |  | 340,743 |  |  | $ | 29.47 |  |  |  | 5.55 |  |  | $ | 5,119,461 |
Nonvested Restricted Stock Shares Activity [Table Text Block] |
|  |  |  |  |  | Weighted-Average |
|  |  |  |  |  | Grant-Date Fair Value |
Nonvested Shares |  | Shares |  |  | Per Share |
Nonvested at January 1, 2024 |  |  | 102,144 |  |  | $ | 29.61 |
Granted |  |  | 42,250 |  |  |  | 41.98 |
Less vested |  |  | 36,581 |  |  |  | 28.19 |
Less forfeited |  |  | 4,000 |  |  |  | 30.73 |
Nonvested at September 30, 2024 |  |  | 103,813 |  |  | $ | 35.10 |

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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (e) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Subparagraph (f)(2) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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